This item uses a 2-cycle oil. This is directly from the manual:
CAUTION! The machine is equipped with a
two--stroke engine and must always be run
using a mixture of petrol and two-stroke
engine oil. It is important to accurately measure
the amount of oil to be mixed to ensure
that the correct mixture is obtained. When
mixing small amounts of fuel, even small
inaccuracies can drastically affect the ratio
of the mixture.
CAUTION! Always use a good quality petrol/oil
mixture (at least 90 octane).
Use low--emission petrol, also known as
alkylate petrol, if it is available.
S The lowest octane recommended is 90.
If you run the engine on a lower octane
than 90, it can result in knocking. This
gives rise to a high engine temperature,
which can result in serious engine damage.
S When working at continuous high revs, a
higher octane rating is recommended.
S For best results and performance, use
HUSQVARNA two--stroke oil, which is
specially formulated for our two--stroke
engines. Mixture 1:50 (2%).
S If HUSQVARNA two--stroke oil is not available,
you may use another two-stroke oil of
good quality that is intended for air cooled
engines. Contact your dealer when selecting
an oil. Mixing ratio 1:33 (3%).
S Never use two--stroke oil intended for
water--cooled outboard engines,
sometimes referred to as outboard oil.
S Never use oil intended for four--stroke
WARNING: Take care when handling
fuel. Bear in mind the risk of
fire, explosion and inhaling fumes.
Answered on 2/24/2015 by Sonny from Lawrencville, GA